Hey all, I am looking for something to clamp to the factory roof rack cross bars. The big mouth clamps didn't work and the Yakima and Thule websites are useless. I need something that confroms to the aero shape of the crossbars so I can mount my roof basket. All help is greatly appreciated!!

I see this is a very old post but I am answering now anyway as I just went through this.. Its the Yakima "railgrab" towers and I used extra long bars (66") so I can get to boards side by side. Hope that helps!